Dot Matrix Hardening of Steels Using a Fiber Optic Coupled Pulsed Nd:YAG Laser
| Autor: | Lijue Xue, G. McGregor, M. U. Islam |
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| Rok vydání: | 1999 |
| Předmět: | |
| Zdroj: | Materials and Manufacturing Processes. 14:53-65 |
| ISSN: | 1532-2475 1042-6914 |
| DOI: | 10.1080/10426919908914804 |
| Popis: | This paper describes a novel process called “Dot Matrix Hardening” as applied to Ol, D2 and AISI 4340 steels. This process uses a pulsed laser (particularly an Nd:YAG laser) to create a uniform distribution of transformation-hardened spots to cover only a certain percentage of the desired surface. Due to significantly reduced energy input, wear resistance can be imparted to thin and intricate parts without distortion. In addition, with the use of a coupled fiber optic beam delivery system, this process provides greater flexibility compared to conventional CO2 laser hardening for a number of applications. The use of an Nd:YAG laser also eliminates the need of absorptive coating required for hardening with a CO2 laser. With optimized processing parameters, a relatively uniform hardened layer is obtained within the hardened spot, with a thickness of about 60 um and hardness values around 800 HV100. The sliding wear test results show that the wear resistance of Ol samples with only 20-40% area covera... |
| Databáze: | OpenAIRE |
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